Product Description
CMT Solid Carbide Upcut Spiral Router Bit - 1/4 in. Diameter is a precision-ground, single-flute spiral routing tool engineered from a special super-micrograin carbide formulation that holds a keen cutting edge far longer than standard carbide-tipped alternatives. Designed for CNC routing machines, router tables, and handheld routers alike, this right-hand upcut spiral bit shears wood cleanly with a low-angle spiral geometry that promotes efficient chip ejection - keeping the cut path clear, the tool running cooler, and the cutting edge lasting longer. Ideal for solid wood, wood composites, plastic materials, and laminates, it handles cutting, copying, panel sizing, and a broad range of routing applications with consistent, clean results.
Key Features
- Super-micrograin solid carbide construction - the entire bit is manufactured from a specially formulated micrograin carbide that produces and holds a keen cutting edge, delivering superior wear resistance and allowing more resharpenings over the life of the tool compared to carbide-tipped designs.
- Low-angle upcut spiral geometry - designed specifically to shear wood fibers cleanly rather than tear them, reducing tearout on solid hardwoods, softwoods, composites, and laminates while simultaneously pulling chips upward and out of the cut for unobstructed routing passes.
- Efficient chip ejection - the upcut spiral action evacuates chips away from the workpiece, preventing chip packing in deep pockets and grooves, which reduces heat buildup and extends edge life during prolonged routing sessions.
- 1 in. cutting height with 2 1/2 in. total length - provides sufficient cutting depth for panel sizing, through-cuts, and deep pocket work while the overall length allows confident reach in standard router collets and CNC spindles.
- 1/4 in. shank diameter - compatible with the widest range of router collets, including standard handheld routers, router tables, and many CNC routing machines, making this a versatile bit for both shop and automated environments.
- Single-flute (1-tooth) configuration - optimized for aggressive material removal and large chip clearance, allowing faster feed rates in softer materials and plastics without clogging the flute.
- Right-hand rotation - matches the standard rotation direction of virtually all routers and CNC spindles, ensuring correct cutting action and chip evacuation direction without any spindle modifications.
- Hardwood and multi-material capability (HWM-rated) - rated for hardwood, wood composites, plastic materials, and laminates, making it a single tool solution for mixed-material panel work and production routing.
Why This Product
- Built for clean cuts in demanding materials - the low-angle spiral and super-micrograin carbide formulation work together to shear solid wood, laminates, and plastic cleanly, reducing the sanding and finishing time needed after routing.
- Runs cooler for longer tool life - efficient chip ejection and the optimized spiral design reduce heat at the cutting edge, which directly translates to fewer bit changes and lower tooling costs over time.
- Versatile across machines and setups - the 1/4 in. shank fits handheld routers, router tables, and CNC routing machines, so the same bit moves from a job shop CNC to a bench-top router table without any compromise in performance.
- Engineered for production routing tasks - suited for cutting, copying, panel sizing, and general routing applications, this bit is built to handle repetitive production work where consistent edge quality and reliable chip clearing are essential.
Specifications
- Manufacturer Part Number: 198.008.11
- Brand: CMT Orange Tools
- Product Type: Solid Carbide Upcut Spiral Bit
- Diameter: 1/4 in.
- Cutting Height: 1 in.
- Total Length: 2 1/2 in.
- Shank Diameter: 1/4 in.
- Number of Teeth: 1
- Rotation: Right-hand (RH)
- Material: Solid Carbide (HWM)
- Macro Class: Router Cutter
Approved Applications
- Cutting and through-routing in solid hardwood and softwood
- Panel sizing and copying operations
- CNC routing and automated production routing
- Deep pocket routing with efficient chip evacuation
- Routing in wood composites, MDF, and plywood
- Routing in plastic materials and laminates
- General routing on router tables and with handheld routers
Frequently Asked Questions
What is the difference between an upcut spiral bit and a standard straight bit?
An upcut spiral bit uses a helical flute geometry that pulls chips upward and out of the cut as the bit rotates. This active chip ejection keeps the cutting path clear, reduces heat buildup at the tip, and allows cleaner cuts in solid wood, composites, and plastic materials compared to a straight flute that relies on gravity and airflow alone to clear chips.
Is this bit compatible with handheld routers, or is it only for CNC machines?
This bit features a 1/4 in. shank diameter, which fits the standard 1/4 in. collets found on handheld routers, router tables, and many CNC routing machines. It is suitable for use across all three machine types, making it a flexible choice for both production CNC work and manual routing applications.
What materials can this upcut spiral bit cut?
According to the product specifications, this bit is designed for use on solid wood, wood composites, plastic materials, and laminates. Its super-micrograin carbide formulation and low-angle spiral geometry are optimized to shear these materials cleanly across cutting, copying, panel sizing, and general routing tasks.
Why does this bit have only one tooth (single flute)?
A single-flute design maximizes the chip clearance space available in the flute, which is especially beneficial when routing softer materials, plastics, or in applications requiring aggressive material removal. With more room for chip evacuation, the bit is less likely to clog during deep passes, and the larger chip load per revolution helps the tool run cooler and cut more efficiently.
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